How to Grep for Text in Files
Grep is a command-line utility that can search and filter text using a common regular expression syntax. It is so ubiquitous that the verb “to grep” has emerged as a […]
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Linux
How to Set up SPF and DKIM with Postfix on Ubuntu Server
What are SPF and DKIM Records? SPF and DKIM are two types of TXT records in DNS that allow you to detect email spoofing and help legitimate emails deliver into
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How to Setup Complete Mail Server
The major components or activities involved in setting or installing a complete email server for production usage involves MTA (Mail Transfer Agent), MDA (Mail Delivery Agent), Antivirus, Spam Detection, and
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Initial Server Setup with Ubuntu 20.04
Introduction When you first create a new Ubuntu 20.04 server, you should perform some important configuration steps as part of the initial setup. These steps will increase the security and
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How to Start, Stop, or Restart Apache Server on CentOS 7
Introduction Apache is part of the popular LAMP (Linux, Apache, MySQL, PHP) stack of software. It’s responsible for the function of most of the internet. This guide will show you how to restart
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How To Add Swap Space on Ubuntu 20.04
Introduction One way to guard against out-of-memory errors in applications is to add some swap space to your server. In this guide, we will cover how to add a swap
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Rsync (Remote Sync): 10 Practical Examples of Rsync Command in Linux
Rsync (Remote Sync) is a most commonly used command for copying and synchronizing files and directories remotely as well as locally in Linux/Unix systems. With the help of rsync command you can copy and synchronize your data remotely and locally across directories, across
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How To Find a File In Linux From the Command Line
Locate Linux Files by Their Name or Extension Type find into the command line to track down a particular file by its name or extension. If you want to look for *.err
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Decrease the size of EBS volume in your EC2 instance
It is impossible to decrease EBS volume size. When you have 100GB EBS and you decide to modify it into 30GB you will get error : The size of a volume
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Install Mautic Marketing Software on Ubuntu 20.04 | 18.04
Running a fully-fledged business can be one of the most satisfying and yet equally challenging task one can ever venture into. Firstly, you have to have a general picture of
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